The Duke of Cambridge, who's currently on his first official visit to Helsinki, Finland, offered a response while exiting an ice-rink (where he was attending an event for a local charity that helps teenagers through ice hockey).

"We're very excited and delighted for them both, and wish them all the happiness in this very exciting time," he said on Wednesday.

Very polished, very charming ... but not especially brotherly – this could have been about anyone, really.

Which is why William's next remark was so much fun.

"For me, personally, I hope it means he stays out of my fridge and will stop him scrounging my food, which he's done for the last few years."

Ah. That's more like it.

Listen to this episode of 9Honey's hit podcast series Life Bites, about the highs and lows of having a sibling:

It's not out of the blue, either.

A Newsweek profile earlier this year discussed Harry's habit of "popping into" the Duke and Duchess of Cambridge's Kensington Palace apartment whenever he was feeling a bit peckish.

He's reportedly always been fond of Duchess Kate Middleton's cooking, especially her roast chicken: a dish he liked so much, he used it to propose to his future wife.

It's highly likely Harry will return the Cambridges' hospitality and invite them around for a Sunday chook; Markle will soon join him in the two-bedroom Nottingham Cottage, close to the Cambridge's apartment on the palace grounds.

"It's a fantastic process you go through, the engagement and the build up to the wedding and things like that," William said in Helsinki.

"So they've got a lot of happy times ahead of them," he added.

"I think they're very caught up in the moment and I wish them all the happiness and success in planning the wedding, I hope it goes really well."